There are various causes of sudden feeling of dizziness, such as lack of sleep, hypoglycemia, cervical spondylosis, cranio-cerebral disorders, etc. Sudden feeling of dizziness may be caused by elevated blood pressure, mainly due to changes in blood pressure, vasodilation, and increased cerebral blood flow, resulting in dizziness, while low blood pressure may also result in dizziness due to insufficient blood supply to the brain. It may be caused by changes in blood glucose, especially hypoglycemia, which is highly prone to dizziness and weakness. Cervical spine diseases cause dizziness because the body is in a position for a long time causing compression of the arteries, which leads to insufficient blood supply to the brain. Patients with cranio-cerebral diseases are also prone to dizziness due to vascular compression and poor blood circulation caused by lesions, and otogenic diseases can also cause sudden vertigo due to diseases in the ear that affect the body’s balance.